USB2512 Просмотр технического описания (PDF) - Unspecified

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USB2512

USB 2.0 Hi-Speed Hub Controller

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Chapter 5 Pin Descriptions

USB 2.0 Hi-Speed Hub Controller

Datasheet

5.1

This chapter is organized by a set of pin configurations (organized by package type) followed by a

corresponding pin list organized alphabetically. A comprehensive and detailed description list of each

signal (named in the pin list) is organized by function in Table 5.2, “USB251x Pin Descriptions,” on

page 22. Please refer to Table 5.3, “Buffer Type Descriptions,” on page 27 for a list of buffer types.

The “N” symbol in the signal name indicates that the active, or asserted, state occurs when the signal

is at a low voltage level. When “N” is not present after the signal name, the signal is asserted when it

is at the high voltage level. The terms assertion and negation are used exclusively. This is done to

avoid confusion when working with a mixture of “active low” and “active high” signals. The term assert,

or assertion, indicates that a signal is active, independent of whether that level is represented by a

high or low voltage. The term negate, or negation, indicates that a signal is inactive.

Pin Configurations and Lists (Organized by Package Type)

SUSP_IND / LOCAL_PWR / NON_REM[0]

VDD33

USBDM_UP

USBDP_UP

XTALOUT

XTALIN / CLKIN

PLLFILT

RBIAS

VDD33

28

18

29

17

30

16

31

SMSC

15

USB2512/12A/12B

32 USB2512i/12Ai/12Bi 14

33 (Top View QFN-36) 13

34

12

Ground Pad

35 (must be connected to VSS) 11

36

10

NC

OCS_N[2]

PRTPWR[2] / BC_EN[2]*

VDD33

CRFILT

OCS_N[1]

PRTPWR[1] / BC_EN[1]*

TEST

VDD33

Indicates pins on the bottom of the device.

Figure 5.1 2-Port 36-Pin QFN

Note: *Battery charging enable (BC_EN) is only available in the USB251xB/Bi.

Revision 1.1 (04-26-10)

12

DATASHEET

SMSC USB251x

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